Motion Control

Vibration Isolators Supplied for James Webb Telescope Testing

Vibration isolators Minus K® Technology Inglewood, CA 310-348-9656 www.minusk.comMinus K Technology was chosen by ITT Space Systems, LLC, a subcontractor to Northrop Grumman Corp., to provide vibration isolators for the ground testing of the James Webb Space Telescope (JWST) at NASA s Johnson Space Center (Houston, TX). The JWST will be placed in a vacuum chamber at Johnson Space Center, and supported by a set of custom vibration isolators.

Posted in: Application Briefs, Motion Control, Vibration, Test equipment and instrumentation

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Electro-Hydraulic Motion Controller for Earthquake Simulation

How do you test the behavior of different soil structures in an earthquake? Obviously, large earthquakes don’t happen often, and they certainly don’t happen on cue. The solution, of course, is to model earthquakes in a laboratory environment. And that’s exactly what is being done by the Center for Geotechnical Modeling at the University of California, Davis. Since it’s not economical to simulate the forces of an earthquake on fullsize soil structures such as one would find beneath a real bridge or large building, physical models of much smaller size are used. In Figure 1, for example, is a model of the San Francisco Bay Area Rapid Transit transbay tube that was recently tested in Davis1.

Posted in: Application Briefs, Motion Control, Computer simulation, Weather and climate, Electrohydraulics

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Connector Improves Reliability, Cuts Cost on Engine Production Line

HARTING North America was recently asked to solve some of the problems associated with power distribution and motion control on a vehicle manufacturer’s long conveyor and engine block production line. The line’s system integrator needed to reduce installation costs to be competitive with other potential suppliers, and the end customer was looking for higher reliability and ease of maintenance.

Posted in: Application Briefs, Motion Control, Connectors and terminals, Production, Engines, Reliability

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Rotary Motors Customized for Telescope Spectrometer

SQUIGGLE® custom rotary piezoelectric motors New Scale Technologies Victor, NY 585-924-4450 www.newscaletech.comThe Wide-Field Multi Object Spectrometer (WFMOS) is a ground-based astronomical instrument that is scheduled to be commissioned on the Subaru Telescope on Mauna Kea, Hawaii in 2013. The WFMOS, along with corrective optics, will be mounted in place of the secondary mirror of the telescope. An array of NASA Jet Propulsion Laboratory’s Cobra fiber positioners will feed light from a 1.5-degree field of the sky to a visible spectrometer, for red shift observations of 2,400 cosmological targets simultaneously. The light will be transferred to the spectrograph using 2,400 f/2.4 fibers with 107 μm cores.

Posted in: Application Briefs, Motors & Drives, Spectroscopy, Customization, Electric motors, Rotary engines

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Delta Motion Controller Helps ADI Improve Automotive Chassis Testing

There’s a science to testing metal structures for rigidity and performance under stress. The development of new testing methodologies is continuing at a fast pace, aided by innovations in supporting technologies. For example, motion controllers have evolved to support special capabilities for exerting real-world forces on structures that can deliver, in a matter of hours or days, the loads and movement that assemblies would otherwise encounter in a whole lifetime of use. And motion control electronics connected to hydraulic or electromechanical actuators can submit assemblies to stresses and measure responses in a “clean” environment that would be difficult or expensive to accomplish in the field.

Posted in: Application Briefs, Motion Control

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Computational Fluid Dynamics Aids Aerospace Apps

Just a few years ago, the use of computational fluid dynamics (CFD) in most aerospace companies was restricted to pure research or troubleshooting problems with existing designs. But in the past few years, newly available CFD tools are fully embedded in the mainstream mechanical design environment and hence much easier, faster and less expensive to use. The trend toward using CFD early stages in the design process has resulted in a large number of new users of this powerful analysis technique. Bell Helicopter technical specialists have developed a set of CFD best practices with the goal of guiding users in following company design guidelines and optimizing the analytical processes. The tools are based on guidelines developed for use by engineers working on propulsion systems. The guidelines are based on the application of Mentor Graphics Mechanical Analysis Division’s FloEFD suite of CFD software used by Bell Helicopter for internal flow simulations.

Posted in: Application Briefs, Motion Control, Computational fluid dynamics, Design processes, Standardization, Rotary-wing aircraft

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QuickSilver Servo Motors Drive Autonomous Vehicles

The design of remotely operated, autonomous battery-powered vehicles places special requirements on motion control systems. High torque at low speeds is needed to climb over obstacles, while higher speed operation is needed for cruise speed. Efficient operation from lower voltages (12V to 48V) reduces battery size and weight requirements, while regenerative drives maximize the operating time and distance by recharging the batteries while braking.

Posted in: Application Briefs, Motors & Drives

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